Input And Output Devices; Flags; Interrupts - Analog Devices ADSP-2189M EZ-KIT Lite Manual

Standard Operations

Input and Output Devices

The board's IO component are detailed in the following sections.
• "Flags" on page 2-4
• "Interrupts" on page 2-4
• "Serial Ports" on page 2-5

Flags

The ADSP-2189M processor has one asynchronous
pin is connected to the amber
states of your program. The other nine programmable flags (PFs) connect
to the expansion area.

Interrupts

The ADSP-2189M EZ-KIT Lite has one external interrupt connected
through a push button switch,
rupt, .
IRQE
The external interrupts are controlled through the
ters and are configured by modifying the interrupt vector table or through
instructions in user code. The
sensitivity between level and edge. To prevent an interrupt from being
masked, write to the
The monitor program running on the ADSP-2189M processor uses one
interrupt (
Timer
code through the monitor program, the timer interrupt vector is protected
and cannot be overwritten. If these vectors are overwritten, or the timer
2-4
FL1
SW1
ICNTL
register.
IMASK
) for normal operation. When downloading your own
ADSP-2189M EZ-KIT Lite Evaluation System Manual
FLAG
LED. This lets you visually inspect
. This corresponds to an external inter-
ICNTL
register also controls the interrupt
IO pin, . The
FL1
and regis-
IMASK